Asynchronous Terminals and Printer Processes Programming Manual

PRINTER PROGRAMMING CONSIDERATIONS

Underline

The model 5520 printer does a partial line feed before underlin-

ing. This feature prevents the line from overlapping the bottom

parts of the characters being underlined. A partial line feed

occurs following a carriage return (%15) only if the next line

contains only underscore (%137) and space (%40) characters.

You can create an application program to use this underlining

capability as follows:

1. Turn off spacing using SETMODE 6,

parameter-1

= 0.

2. Write the desired text.

3. Turn spacing back on by calling SETMODE 6,

parameter-1

= 1.

4. Write a buffer, consisting only of underscore and space

characters, to underline the desired parts of the text

written in step 2.

Example

The following calls illustrate the use of partial line feeds for

underlining.

INT .DATABUF1 [0:11] := ["THIS WILL BE UNDERLINED."],

.DATABUF2 [0:11] := ["_______________________ "];

! turn off spacing

CALL SETMODE ( FILENUM, 6, 0 );

! write the text

CALL WRITE ( FILENUM, DATABUF1, 24 );

! turn spacing back on

CALL SETMODE ( FILENUM, 6, 1 );

! underline the text

CALL WRITE ( FILENUM, DATABUF2, 24 );

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